Ultra high efficiency DC Inverter+ Ductless Split Ceiling Cassette Heat Pump system with 360° Air Flow Panel Complete system set consisting of; Indoor Unit, Air Flow Panel, Outdoor Unit and Installation Kit 18,000 BTU/h Cooling Capacity with 20.0 SEER High Efficiency Rating 18,000 BTU/h Heating Capacity with 10.3 HSPF High Efficiency Rating Voltage: 208~230 VAC, 60 Hertz, 1 Phase. For other specks see all pictures provided; Suitable Area: 350~450 Sq.F